Consider following form:

<form action="/">
    <input type="hidden" name="option" value="default">
    <input type="radio" name="option" value="A">
    <input type="radio" name="option" value="B">
    <input type="hidden" name="settings[1]" value="0">
     <input type="checkbox" name="settings[1]" value="1" id="setting-1">
    <button>klickme</button>
</form>

Form generated by CakePHP and Laravel automatically. This works the way that when no radio button was selected or checkbox was checked a value from hidden field with same name attribute used in POST and getValue method of corresponding FormField in DomCrawler.

Right now this results in Fatal Error with radio button (because hidden field which is discovered first in considered as radio button, when a radio button with same name is found), see Behat/Mink#349:

Fatal error: Call to undefined method Symfony\Component\DomCrawler\Field\InputFormField::addChoice() in ./vendor/symfony/dom-crawler/Symfony/Component/DomCrawler/Form.php on line 412

and has no effect (default value from hidden field isn't used), when we're dealing with checkbox, see Behat/Mink#595 .

Related issues:

• Behat/Mink#349
• Behat/Mink#595